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| Section | Objectives |
|---|---|
| Topic 1: EVPN-VXLAN Signaling | - Configuration and Troubleshooting
|
| Topic 2: VXLAN | - VXLAN Concepts
|
| Topic 3: Layer 3 Fabrics | - IP Fabric Concepts
|
| Topic 4: Data Center Multitenancy and Security | - Architectures
|
| Topic 5: Data Center Interconnect | - Configuration and Troubleshooting
|
| Topic 6: Data Center Deployment and Management | - Data Center Deployment Concepts
|
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NEW QUESTION # 106
Exhibit.
Referring to the exhibit, which statement Is true?
Answer: C
Explanation:
* Understanding Network Architectures:
* ERB (Edge Routed Bridging) architecture involves routing at the network's edge (leaf nodes), while traffic between leaf nodes is switched. This is commonly used in VXLAN-EVPN setups.
* Analysis of the Exhibit:
* The exhibit shows configurations related to routing instances, VXLAN, and VLANs, with VNIs being used for each VLAN. This setup is characteristic of an ERB architecture where each leaf device handles Layer 3 routing for its connected devices.
Conclusion:
* Option B:Correct-The configuration shown corresponds to an ERB architecture where routing occurs at the network's edge (leaf devices).
NEW QUESTION # 107
Exhibit.
You are troubleshooting a DCI connection to another data center The BGP session to the provider is established, but the session to Border-Leaf-2 is not established. Referring to the exhibit, which configuration change should be made to solve the problem?
Answer: C
Explanation:
* Understanding the Configuration:
* The exhibit shows a BGP configuration on a Border-Leaf device. The BGP group UNDERLAY is used for the underlay network, OVERLAY for EVPN signaling, and PROVIDER for connecting to the provider network.
* The OVERLAY group has the accept-remote-nexthop statement, which is designed to accept the next-hop address learned from the remote peer as is, without modifying it.
* Problem Identification:
* The BGP session to Border-Leaf-2 is not established. A common issue in EVPN-VXLAN environments is related to next-hop reachability, especially when accept-remote-nexthop is configured.
* In typical EVPN-VXLAN setups, the next-hop address should be reachable within the overlay network. However, the accept-remote-nexthop can cause issues if the next-hop IP address is not directly reachable or conflicts with the expected behavior in the overlay.
* Corrective Action:
* D. delete protocols bgp group OVERLAY accept-remote-nexthop:Removing this command will ensure that the device uses its own IP address as the next-hop in BGP advertisements, which is standard practice in many EVPN-VXLAN setups. This change should help establish the BGP session with Border-Leaf-2.
Data Center References:
* Proper handling of BGP next-hop attributes is critical in establishing and maintaining stable BGP sessions, especially in complex multi-fabric environments like EVPN-VXLAN. Removing accept- remote-nexthop aligns with best practices in many scenarios.
NEW QUESTION # 108
You want to suppress unnecessary ARP flooding in your EVPN-VXLAN fabric. Which EVPN route type enables this capability?
Answer: A
Explanation:
EVPN Type 2 routes, also known as MAC/IP Advertisement routes, carry both the MAC address and the associated IP address of a host. By distributing this information to all VTEPs, leaf devices can build a local ARP/ND cache and respond directly to ARP requests on behalf of remote hosts, a feature known as ARP suppression, which reduces the amount of ARP broadcast traffic flooded across the fabric.
NEW QUESTION # 109
In an EVPN-VXLAN fabric, which statement describes the purpose of an EVPN Type 5 route?
Answer: A
Explanation:
EVPN Type 5 routes, also known as IP Prefix routes, are used to advertise Layer 3 reachability information for subnets or host routes across VXLAN domains. This allows inter-subnet routing between different VNIs or between data centers without requiring the destination MAC address to be known, which is especially useful for DCI scenarios and route summarization.
NEW QUESTION # 110
Exhibit.
Referring to the configuration shown in the exhibit, assume that there is no external router present, and that the configuration is fabric-only.
Which two statements are true about the example configuration? (Choose two.)
Answer: B,D
Explanation:
* Understanding the Configuration:
* The exhibit shows configurations for two VRFs (Customer_A and Customer_B) with specific VLANs and VNIs assigned. Each VRF has interfaces (IRBs) associated with particular VLANs.
* Communication Between VLANs and Routing Instances:
* Option B:VLAN 400 (irb.400) is part of Customer_B, and there is no direct connection or routing between Customer_A and Customer_B in the configuration provided. Therefore, devices in irb.400 cannot communicate directly with devices in the Customer_A routing instance.
* Option D:Since irb.400 (VLAN 400) and irb.800 (VLAN 800) are part of the same routing instance (Customer_B), they can communicate over the fabric using VXLAN encapsulation.
Conclusion:
* Option B:Correct-There is no direct communication between devices in irb.400 (Customer_B) and routing instance Customer_A.
* Option D:Correct-Devices in VLAN 400 and VLAN 800 can communicate within the Customer_B routing instance over the fabric.
NEW QUESTION # 111
......
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